Electrical appliance to be mounted on a retainer

ABSTRACT

The invention proposes an electrical device for attachment to a holder, particularly in a vehicle, wherein the electrical device is attached on the one side by means of a hook connector and on the other side by means of a detent mechanism, preferably a pivoting ratchet. The detent mechanism can be secured by means of a lock so as to prevent unauthorized removal of the electrical device, which is preferably a display unit.

CROSS-REFERENCE

The invention described and claimed hereinbelow is also described inPCT/DE02/04040, filed on Oct. 30, 2002 and DE 102 02 034.5, filed Jan.18, 2002. This German Patent Application, whose subject matter isincorporated here by reference, provides the basis for a claim ofpriority of invention under 35 U.S.C. 119 (a)–(d).

BACKGROUND OF THE INVENTION

The invention is based on an electrical device for attachment to aholder. A holder, in particular for a monitor in a vehicle, is alreadyknown from U.S. Pat. No. 5,288,049. In it, an electrical device in theform of a monitor is slid into a clamp mounted to a vehicle roof andafter being slid into place, is secured by means of a lock. When themonitor is being mounted, it must be moved along the clamp along theentire sliding path, i.e. in accordance with its length. In addition,when the monitor is being mounted, the monitor, which is above the headof the installer, must be inserted into the clamp provided for theholder in a precisely fitting manner.

SUMMARY OF THE INVENTION

The electrical device according to the invention, has the advantage overthe prior art that it is easy to attach to a holder provided toaccommodate it. To this end, the electrical device is first attached tothe holder by means of at least one hook. Then the electrical device ispivoted on the hook in relation to the holder so that the device locksinto a second connection with the holder. A sliding motion, which canalso involve wear and contamination in the form of shavings, cantherefore be avoided, thus facilitating installation and extending theservice life beyond that of a rail support. In addition, an installercan see the hooks while inserting the electrical device, thus furtherfacilitating insertion. The installation space required for mounting theelectrical device is also reduced since the electrical device can beplaced directly against the holder, without having to provide additionalinstallation space in the vicinity of the holder to allow for a slidingmovement.

It is particularly advantageous if the hook for the first connection isprovided on the electrical device and a receptacle for the hook isprovided on the holder. This prevents hooks from protruding out from thereceptacle, thus avoiding the risk of accidents presented by hooksprotruding from the holder after the electrical device is removed fromthe holder.

It is also advantageous if the receptacle for the hook is provided witha pin that engages in a suitable hole provided in the hook in order toaccommodate the pin. This secures the electrical device in relation tothe holder, even if the second connection, i.e. the locking mechanism,has already been released. This prevents the electrical device fromsuddenly pivoting in relation to the holder.

It is also advantageous to attach a top of the electrical device to anunderside of the holder since this permits a suspended installation forthe electrical device, which on the one hand, permits an elevatedinstallation position and on the other hand, leaves the bottom surfaceavailable for other uses.

In particular, a locking mechanism can be advantageously achieved bymeans of a pivoting catch that engages with an edge of the holder. Thisprovides a secure hold of the electrical device in relation to theholder since the hooks engage the holder from a first side and the catchengages the holder from the opposite side. The locking advantageouslyoccurs automatically as soon as the electrical device, which is alreadyattached to the holder by means of the first connection, comes to restagainst a support surface of the holder.

It is also advantageous for the locking mechanism to be designedparticularly in the form of a lockable pivoting ratchet since on the onehand, this prevents a removal of the electrical device from the holderwhen it is in the locked position and on the other hand, engages withthe holder, preferably in an automatic fashion, when the electricaldevice is inserted into the holder.

It is also advantageous for the electrical device to be embodied with ahousing containing an electrical component, wherein the hook and thedetent mechanism are provided on the housing. This makes it possible toreplace the electrical component inside the housing, thus rendering itunnecessary to also replace the holder device when replacing theelectrical component.

It is also advantageous to cover at least part of the housing of theelectrical device with a protective layer made of plastic, which ispreferably comprised of a soft, foamed, and therefore shock-absorbingmaterial. On the one hand, this can prevent injury to users due tocollisions with the electrical device and on the other hand, theelectrical device is protected from damage and possibly from corrosion.

It is also advantageous to provide a plug connection on a side of theelectrical device oriented toward the holder. After installation of oneof the electrical devices, the plug connection is preferably no longeraccessible without releasing the locking mechanism, thus assuring thatthe electrical device is electrically connected to a supply voltageand/or protecting a data source from being touched.

It is particularly advantageous to embody the electrical device as adisplay unit since the attachment to the holder permits a securesupport, e.g. even in a vehicle. In particular, the display units, whichare often embodied as expensive components, can be protected fromunauthorized removal. In addition, display units often need to bemounted in elevated positions; in this particular regard, the inventionpermits a display unit to be suspended underneath a support.

It is particularly advantageous to provide a holder for mounting anelectrical device to the underside of a vehicle roof, a luggage rack, ora ventilation conduit inside a vehicle, since providing information tothe driver or passengers requires expensive devices, which on the onehand, have to be mounted in exposed positions, and on the other hand,must be protected from unauthorized removal and protected from damagewhile driving.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments of the invention are shown in the drawings andwill be explained in detail in the description that follows.

FIG. 1 is a side view of an electrical device according to theinvention, in the form of a display unit, on a holder,

FIG. 1 a shows an electrical device that is suspended in the holder onlyin a first connection, before it is locked into the second connection,

FIG. 2 is a front view of the electrical device according to FIG. 1,

FIG. 3 is a view of a top of the electrical device,

FIG. 4 is a first longitudinal section through the top of the electricaldevice,

FIG. 5 is another longitudinal section through the top of the electricaldevice,

FIG. 6 is a detail view of a pivoting ratchet,

FIG. 7 is a bottom view of a holder according to the invention,

FIG. 8 is a first longitudinal section through a holder according to theinvention, and

FIG. 9 is a second longitudinal section through a holder according tothe invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Any electrical device can be used as the electrical device according tothe invention. An installation of an electrical device according to theinvention is particularly advantageous if it is necessary for it to bemounted to the underside of a supporting structure, i.e. a suspendedinstallation. This is the case, for example, with kitchen appliances,computer cases, radios, televisions, or monitors. The installation on aholder according to the invention permits not only a simpleinstallation, but also facilitates replacement, e.g. in the event of adefect or required maintenance. In particular, it is also possible toremove the electrical device as needed. The description below willexplain an electrical device and holder according to the invention inconjunction with the example of an installation of a monitor in avehicle. The type of vehicle is arbitrary, e.g. an aircraft, a boat, ora motor vehicle. In particular, though, the installation of a monitor isadvantageous in a vehicle that carries a large number of passengers,e.g. a tour bus, wherein the intent is to provide a large number ofpassengers with as large a screen as possible, which offers the largenumber of passengers a quality image but which, due to its large size,is also heavy and therefore difficult to install.

As an example of an electrical device, FIG. 1 shows a monitor 1 that ismounted to a holder 2. The holder 2 in turn is attached to a support 3so that the support 3 also supports the monitor 1 by means of the holder2. A front side 4 has a display that is not shown in FIG. 1; the monitor1 also contains an image-generating unit that is likewise not shown. Apower and/or data supply line 5 depicted with dashed lines is routedinto the monitor 1 from the support 3. The attachment of the monitor 1to the holder 2 is secured by means of a lock 6. When the lock is open,the monitor 1 can be removed from the holder 2 by pressing on thepressure surface 7. In a support surface 8, a top of the monitor 1 restsagainst an underside of the holder 2 oriented away from the support 3.In other exemplary embodiments, it is also possible for the support 3and the holder 2 extending parallel to it to be vertically mounted. Themonitor can display television images, video images, and/or text andgraphical data.

FIG. 2 is a front view of the monitor 1. The front side 4 of the monitor1 accommodates a display surface 9 of a display unit. In a firstexemplary embodiment, this display surface 9 is the display surface of acathode ray tube. However, any other type of display is also possible,e.g. a plasma screen or a liquid crystal cell. In another exemplaryembodiment, the front side 4 is provided with control elements 10 forcontrolling the display and/or an air interface 11 to receive signalsfrom a remote control unit, not shown in FIG. 2, that is used to controlthe display. Except for the region of the display surface 9, the controlelements 10, the air interface 11, and the top of the monitor 1 orientedtoward the holder 2, an outer wall of the monitor is covered with aprotective layer made of a plastic material, e.g. a silicon layer or, ina preferred exemplary embodiment, a soft polyurethane foam layer. Thesoft foam layer is preferably approx. 10 mm thick. On the one hand, thisprotects the monitor 1 from damage and on the other hand, protects thepassengers of the vehicle in the event of a collision with the monitor1. For example, the support 3 adjoins the underside of a luggage rackand constitutes a bottom plate of the luggage rack, thus permitting themonitor 1 to be mounted under the luggage rack. The support 3 can alsobe a vehicle roof or a wall of a ventilation conduit, permitting an airflow to be directed at the side of the support 3 oriented away from theholder 2. Preferably the power and/or data supply lines 5 can be routedto the monitor 1 through the inside of the support 3.

FIG. 3 is a view of a top of the monitor 1. In FIGS. 1 and 2, the topdepicted in FIG. 3 is oriented toward the side of the holder 2 facingaway from the support 3. A cover plate 31 is fitted into a frame 30 thatrepresents a boundary at the edges of the cover plate 31 and a housingof the monitor 1. The cover plate 31 is attached to the frame 30 bymeans of screws 32. It is also possible to use other connections insteadof the screws 32, for example riveted connections or detent connections.In a region oriented toward the front side 4, a first hook 41 and asecond hook 42 protrude from the cover plate 31 and engage in openingsprovided for them in the holder 2 when the monitor 1 is placed againstthe holder 2. A first hole 43 is provided in the first hook 41 and asecond hole 44 is provided in the second hook 42. The holes 43, 44 areprovided to accommodate pins, which are formed onto the holder 2 andserve to secure the monitor 1 in relation to the holder 2. It is alsopossible for only one hook or for a number of hooks to be formed ontothe cover plate 31.

In addition, ventilation slots 33 are provided in the cover plate 31. Inanother exemplary embodiment, tabs 34, 34′ are also bent out from thecover plate 31 in the direction of the holder 2 and correspondingopenings are provided in the holder 2 to accommodate these tabs 34, 34′.As a result, the monitor 1 is also secured laterally in relation to theholder 2 in this embodiment.

The hooks 41, 42, together with the associated receptacles in the holder2, represent a first connection between the monitor 1 and the holder 2.The second connection is produced by a pivoting ratchet 35, which isdisposed on an edge of the cover plate 31 oriented away from the frontside 4, which cover plate 31 is fitted into the frame 30. A catch 36 ofthe pivoting ratchet extends above the cover plate 31 while the pivotingratchet 35 is supported inside the monitor 1 on the side of the coverplate 31 oriented away from the holder 2. When inserted into the holder2, the catch 36 engages an edge provided for it on the holder 2 andsecures it against the cover plate 31. The pivoting ratchet 35 is heldin a neutral position by means of a spring that is not shown in FIG. 3.It can also be moved out of the neutral position by means of a mechanismnot shown in FIG. 3. In this case, a lock 37 can secure and release thepivoting ratchet 35 when a suitable key 38 is turned. In a preferredembodiment, the key 38 can only be removed when the lock 37 is in thelocked position.

On its side oriented toward the holder 2, the catch 36 has a leaf spring48 formed onto it, which serves to bend the pivoting ratchet 35 back inrelation to a urn spring when the monitor 1 is being inserted so thatonce the catch 36 passes beyond an edge of the holder 2, it canautomatically engage behind the edge due to the force of the returnspring. In order to provide a supply voltage to the monitor 1, a plug 40with a connecting region 45 is mounted in a hollow 39 of the cover plate31. A cable 46 leads to operating electronics of the monitor 1, whichare not shown in the drawing.

In an exemplary embodiment not shown in the drawings, the display unitcan also be inserted into a housing constituted by the frame 30 so thatthe display unit can be removed from the frame 30, for example byunscrewing the cover plate 31. This makes it possible to replace thedisplay unit without having to also replace the mechanical componentsfor the holder.

FIGS. 4 and 5 show sectional views along the lines IV and V in FIG. 3.Here and below, elements that are the same are labeled with the samereference numerals. As a complement to the depiction in FIG. 3, FIG. 4shows a protective layer 47 made of a soft foam material, which isattached to the outsides of the frame 30 of the monitor 1. The coverplate 31 is embodied as a plate; the material thickness is selected sothat a simple engagement of the hooks 41, 42 in receptacles provided forthem allows the monitor to be easily secured by the hooks 41, 42,without allowing the hooks to bend. During manufacture, the hooks 41, 42are preferably cut out from the cover plate 31 by a stamping process andare then bent out from it. The hollow 39 is correspondingly also formedout of the cover plate 31 by means of a stamping process and asubsequent shaping process.

In another exemplary embodiment not shown in the drawings, the coverplate 31 can also be embodied of one piece with the frame 30. The plug40 and the connecting region 45 are preferably embodied so that theyshield against electromagnetic radiation, on the one hand, allowing datato be transmitted without interference and on the other hand, preventingthis transmission from negatively affecting other electrical systems.The same is true for the cable 46. If necessary, e.g. forelectromagnetic shielding reasons, it would also be possible to providea number of plugs in the hollow 39.

FIG. 5 is a side view of the design of the pivoting ratchet 35, whosecatch 36 engages with an edge of the holder 2 and secures it against thecover plate 31. The pivoting ratchet 35 is supported in a moving fashionon a rotation axle 51; a contact region 52 in the form of an extensionof the frame 30 holds the rotation axle 51 parallel to the back of themonitor 1 on which the lock 37 is provided. In the region of thepressure surface 7, the protective layer 47 also extends over a lever 53with which the pivoting ratchet 35 can be moved in opposition to thespring force of a return spring 54. When the lever 53 is pressed and thepivoting ratchet 35 is pivoted, the catch 36 releases the edge of theholder 2. The lever 53 is guided through an opening 56 of the frame 30,thus permitting pressure to be exerted on the lever 53 through theprotective layer 47, which permits the lever 53 to be pivoted. In afirst exemplary embodiment, the protective layer 47 extends flat overthe opening 56. A marking is provided on the protective layer 47 toindicate the presence of the pressure surface for actuating the lever53. In another embodiment, the protective layer 47 over the opening 56can also be raised up in relation to the surrounding region. The returnspring 54 is fastened to the frame 30 on the side of the opening 56oriented away from the cover plate 31. After the lever 53 is released,the spring force of the return spring 54 moves the pivoting ratchet backinto its starting position. If the edge is released, then the monitor 1can be pivoted on the hooks 41, 42 so that the edge 50 moves past thecatch 36. Then the monitor, which is now attached to the holder 2 onlyin the first connection by means of the hooks 41, 42, can be removedfrom the holder 2 by guiding the hooks 41, 42 out of receptacles in theholder 2. The installation occurs in the reverse sequence in that thehooks 41, 42 of the monitor 1 are inserted into the holder 2 and thenthe monitor 1 is pivoted with the catch 36 toward the holder 2 until theleaf spring 48 reaches the edge, wherein the leaf spring 48 causes theedge to press the catch 36 back so that after sliding past the edge ofthe holder, the catch 36 can engage behind this edge. As a result, theelectrical device, which is embodied as a monitor 1 in this instance, islocked to the holder 2 by means of the second connection comprised ofthe catch 36 and the edge 50. The monitor 1 here is supported both bythe hooks in the first connection, which have been inserted into theirreceptacles on the holder, and by the second connection of the holder 2.

FIG. 6 shows the pivoting ratchet in detail. The leaf spring 48 isfastened to the catch 36. The return spring 54 is preferably attached tothe frame 30 by means of screws 55. An extension 57, 57′ of the pivotingratchet 35 at the two ends of the rotation axle 51 contacts the contactregions 52 of the frame 30. The rotation axle 51 extends through boreopenings in the contact regions 52 and through bore openings in theextensions 57, 57′. The pivoting ratchet 35 can be prevented from movingin relation to the return spring by means of a securing catch 61depicted with dashed lines, which the lock 37 can pivot onto a side ofthe pivoting ratchet 35 oriented away from the frame 30. This securesthe catch 36 in a position in which it holds the edge 50 of the holder2. The securing catch 61 can be pivoted on an axle 62 in the directionof the arrows, the axle 62 being connected to the closing cylinder ofthe lock 37. As a result, the monitor 1 cannot be removed from theholder 2 without the actuation of the lock 37 when the securing catch 61is in the position behind the pivoting ratchet, as shown in FIG. 6.

FIG. 7 is a bottom view of the holder 2, i.e. viewed from the positionof the monitor 1 in FIG. 1. A plate 70 has a first recess 71, a secondrecess 72, a third recess 73, and a fourth recess 74 formed into it. Therecesses accommodate respective screws 75, which fasten the holder 2 tothe support 3. The recesses 71, 72, 73, 74 are preferably formed out ofthe plate 70 of the holder 2 by means of a stamping process and asubsequent shaping process. The first recess 71 and the second recess 72simultaneously constitute the receptacles for the first hook 41 and thesecond hook 42, the first hook 41 being inserted into the second recess72 and the second hook 42 being inserted into the first recess 71. Onthe lateral edge of the plate 70 oriented away from the first recess 71and the second recess 72, an indentation is provided, which constitutesan edge 50 to accommodate the catch 36. The plate 70 is also providedwith a mating connector 76 and a hollow 77 that accommodates the plug40. Optionally, the plate 70 is provided with slots 82, 82′, which serveto accommodate the protruding tabs 34, 34′ of the cover plate 31.

The monitor 1 is then mounted by inserting the hooks 41, 42 into therecesses 71, 72. A simplified view of this state is depicted in FIG. 1a. Then, the plug 40 is connected to the mating connector 76. To thisend, the cable 46 is embodied as flexible so that it can be pulled acertain distance out from the monitor 1. Then the monitor 1 is pivotedtoward the holder 2 in the direction of the arrow. If the catch 36reaches the holder 2, then it automatically engages with the edge 50, asexplained above in conjunction with FIG. 6. In the process of this, thecable 46 slides back into the housing of the monitor 1. The matingconnector 76 has a plug region 79 that preferably ends flush with theconnecting region 45 of the plug 40.

FIGS. 8 and 9 show longitudinal sections through the holder 2 accordingto the dashed lines VIII and IX in FIG. 7. In particular, FIG. 8 showsthe edge 50 that is engaged by the catch 36 depicted with dashed lines.In a preferred exemplary embodiment, the edge 50 can be beveled on aside oriented toward the leaf spring 48 that contacts it during theengagement.

FIG. 9 shows a longitudinal section through the holder 2 in the regionof the mating connector 76. The mating connector 76 is preferablymounted to the plate 70 by means of screws that are not shown in FIG. 9.At the edges, the plate 70 is bent toward the support 3. Preferably, abridge piece 78 separates the hollow 77 from the fourth recess 74.

The first hook 41 is depicted with dashed lines and, after insertioninto the second recess 72, rests against a support surface 80 of theplate 70 on the side of the plate 70 oriented away from the cover plate31. The support surface 80 is provided with a pin 81, which engages inthe first hole 43 of the first hook 41. In order to unhook the monitor 1from the holder, the first hook 41 must be lifted past the pin 81, thuspreventing the monitor from falling out of the holder 2 after thepivoting ratchet 35 is released. This constitutes an additionalprotective measure. In a preferred embodiment, the first hook can bepivoted slightly around the pin 81 so that after the first hook 41 ishooked onto the support surface 80, it can still be pivoted, thuspermitting the plug 40 and the mating connector 76 to be connected.

1. An electrical device for attachment to a holder in a vehicle, whereinthe electrical device (1) is attached to the holder (2) in a firstconnection by means of at least one hook (41, 42), wherein theelectrical device (1) can pivot in relation to the holder (2) becausethe at least one hook (41, 42) can pivot in relation to the holder (2,71, 72), and wherein the electrical device (1) can be looked to theholder (2) in a second connection (36, 50), wherein the at least onehook (41, 42) is provided on the electrical device (1, 31), wherein areceptacle (71, 72, 81) for the at least one hook (41, 42) is embodiedon the holder (2), wherein a pin (81) is provided on the receptacle (71,72), wherein a hole (43, 44) for accommodating the pin (81) is providedin the hook (41, 42), and wherein the pin (81) secures the hook (41, 42)in the receptacle (71, 72).
 2. The electrical device according to claim1, wherein a top (31) of the electrical device (1) can be attached to anunderside (70) of the holder (2).
 3. The electrical device according toclaim 1, wherein the electrical device (1) can be locked to the holder(2) by means of a pivoting catch (36).
 4. The electrical deviceaccording to claim 3, wherein the catch (36) engages an edge (50) of theholder (2).
 5. The electrical device according to claim 1, wherein thepivoting catch (36) is disposed on a pivoting ratchet (35).
 6. Theelectrical device as defined in claim 5, wherein the pivoting catch (36)is pivotably provided on the electrical device.
 7. The electrical deviceas defined in claim 5, wherein the pivoting ratchet (35) is securable bymeans of lock (37).
 8. The electrical device according to claim 1,wherein the electrical device is provided with a detent mechanism thatautomatically engages with the holder (2) in detent fashion when theelectrical device is pivoted against the holder.
 9. The electricaldevice according to claim 1, wherein the locking (35, 36, 50) of theelectrical device to the holder (2) is secured by means of a lock (6,37).
 10. The electrical device according to claim 1, wherein theelectrical device (1) has at least one housing (30) and an electricalcomponent (9), that the electrical component (9) is fastened inside thehousing (30), and that the at least one hook (41, 42) is provided on thehousing (30).
 11. The electrical device according to claim 1, whereinthe housing (30) of the electrical device (1) is at least partiallycovered with a protective layer (47) made of a plastic material.
 12. Theelectrical device according to claim 1, wherein a plug connection (40)is provided on a side of the electrical device (1) oriented toward theholder (2).
 13. The electrical device according to claim 1, wherein theelectrical device (1) has at least one display unit (9), preferably acathode ray tube display.
 14. The electrical device as defined in claim13 wherein the at least one display unit (9) in a cathode ray tubedisplay.
 15. An electrical device for attachment to a holder in avehicle, wherein the electrical device (1) is attached to the holder (2)in a first connection by means of at least one hook (41, 42), whereinthe electrical device (1) can pivot in relation to the holder (2)because the at least one hook (41, 42) can pivot in relation to theholder (2, 71, 72), wherein the electrical device (1) can be looked tothe holder (2) in a second connection (36, 50), wherein the electricaldevice (1) has at least one display unit (9), wherein the at least onedisplay unit (9) is a cathode ray tube display.
 16. The electricaldevice according to claim 15, wherein the at least one hook (41, 42) isprovided on the electrical deviCe (1, 31) and that a receptacle (71, 72,81) for the at least one hook (41, 42) is embodied on the holder (2).17. The electrical device according to claim 16, wherein a pin (81) isprovided on the receptacle (71, 72), that a hole (43, 44) foraccommodating the pin (81) is provided in the hook (41, 42), and thatthe pin (81) secures the hook (41, 42) in the receptacle (71, 72). 18.The electrical device according to claim 15, wherein a top (31) of theelectrical device (1) can be attached to an underside (70) of the holder(2).
 19. The electrical device according to claim 15, wherein theelectrical device (1) can be locked to the holder (2) by means of apivoting catch (36).
 20. The electrical device according to claim 19,wherein the catch (36) engages an edge (50) of the holder (2).
 21. Theelectrical device according to claim 15, wherein the pivoting catch (36)is disposed on a pivoting ratchet (35).
 22. The electrical device asdefined in claim 21, wherein the pivoting catch (36) is pivotablyprovided on the electrical device.
 23. The electrical device as definedin claim 21, wherein the pivoting ratchet (35) is securable by means oflock (37).
 24. The electrical device according to claim 15, wherein theelectrical device is provided with a detent mechanism that automaticallyengages with the holder (2) in detent fashion when the electrical deviceis pivoted against the holder.
 25. The electrical device according toclaim 15, wherein the locking (35, 36, 50) of the electrical device tothe holder (2) is secured by means of a lock (6, 37).
 26. The electricaldevice according to claim 15, wherein the electrical device (1) has atleast one housing (30) and an electrical component (9), that theelectrical component (9) is fastened inside the housing (30), and thatthe at least one hook (41, 42) is provided on the housing (30).
 27. Theelectrical device according to claim 15, wherein the housing (30) of theelectrical device (1) is at least partially covered with a protectivelayer (47) made of a plastic material.
 28. The electrical deviceaccording to claim 15, wherein a plug connection (40) is provided on aside of the electrical device (1) oriented toward the holder (2).
 29. Anelectrical device for attachment to a holder in a vehicle, wherein theelectrical device (1) is attached to the holder (2) in a firstconnection by means of at least one hook (41, 42), wherein theelectrical device (1) can pivot in relation to the holder (2) becausethe at least one hook (41, 42) can pivot in relation to the holder (2,71, 72), and wherein the electrical device (1) can be locked to theholder (2) in a second connection (36, 50), wherein the electricaldevice (1) can be locked to the holder (2) by means of a pivoting catch(36), wherein the pivoting catch (36) is disposed on a pivoting ratchet(35), wherein the electrical device Is provided with a detent mechanismthat automatically engages with the holder (2) in detent fashion whenthe electrical device is pivoted against the holder, wherein thepivoting ratchet (35) is prevented from moving by means of a securingcatch (61), and wherein an axle (62) of the securing catch (61) isconnected to a closing cylinder of a lock (37).